Al Samman, Ahmed, and Mahmoud Moustafa Otaify. “How Does Volatility of Characteristics-Sorted Portfolios Respond to Macroeconomic Volatility?”. International Journal of Economics and Financial Issues 7, no. 4 (July 31, 2017): 300–315. Accessed April 29, 2024. https://www.econjournals.com/index.php/ijefi/article/view/4932.